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利用盐碱苗圃地树苗行间空地种植耐盐绿肥作物毛叶苕子和二月兰,生产有机物料并就地翻压还田,不仅改良盐碱土壤物理性状,还提升土壤肥力。连续种植绿肥并翻压三年后,土壤中Na+含量降低,0~40 cm土层的盐分含量降低了37%以上,土壤有机质由8.43 g kg-1上升到10.51 g kg-1以上,土壤全氮增加近1倍,速效磷由4.36~4.67 mg kg-1增加到12.0 mg kg-1以上,速效钾增加10.37%~10.71%;土壤真菌,细菌,放线菌数量均有大幅度增加,土壤转化酶活性有较大提高,表层0~20 cm土壤容重由1.51 g cm-3降低到1.33 g cm-3,土壤疏松,结构良好,利于苗木生长。
The use of salt-alkali nursery to plant saplings interstice planting salt-resistant green manure leaves crops and leaves in February orchid, the production of organic materials and the local pressure back to the field, not only to improve the physical properties of saline-alkali soil, but also enhance soil fertility. After continuously planting green manure and turning over pressure for three years, the content of Na + in the soil decreased, the salt content in 0-40 cm soil layer decreased by more than 37%, and the content of soil organic matter increased from 8.43 g kg-1 to 10.51 g kg-1. Nitrogen nearly doubled, available phosphorus increased from 4.36 ~ 4.67 mg kg-1 to above 12.0 mg kg-1, and available potassium increased from 10.37% to 10.71%. The quantity of soil fungi, bacteria and actinomycetes increased greatly, The invertase activity increased greatly. The bulk density of 0-20 cm soil layer in surface layer decreased from 1.51 g cm-3 to 1.33 g cm-3, and the soil was loose and well-structured.